Road-grader.



PATENTED DEC. 18, 1906.

J. W. LANG-PITT.

" ROAD GRADER. APPLI-OA ION 3mm APB,.18.1906..

s SHEETS-SHEET 1.

a sun's-sum 2.

PATEN'TED DEC. 18, 1906.

J. w, LANGFI TT. ROAD GRADBR. nruou xon rILnn APB.18.1908.

' s e e,

' ibial-Z t tgmaly concerni p Bait known that I, Jon Lil-sewn, a

.S, BATENT W GF aiw ABEL, mw'l; QBPADTGBA DEla.

' eitifzen'of'the United-Statearesiding at Adel,

Road-Grader,

- the countyof Dallas and State of Iowa,-

have invented; a certain new; and useful pecification. I v

iTheiobject, of my invention is to provide a -1oad-grader of simple,durable,- and inexpensieve construction-111' which two blades arerqvid'e'd to stand onopposite sidesof the ongitudinal centerof themachine and "at E'acute angles relative to. the line of advance-toscrape earth toward the center of the machine and to provide means forindependently adjustin' the bladeaftoward and from the center o themachine, and also, to independently adjust each blade up and down from apoeition engaging the road-surface to a position-at rest abovethe'machineframe.

A'further obj ect'isto provide means wherethe frame that supports theblades may ifr'eely .tilt relative to the front axle to a "limitedextent,v so that the blades andisupporting-wheels automatically accom- Ymodate themselves to slight inequalities-in strain iipon either blade. gI v further "object is to provide'ia steering the road-surface withoutthrowing an undue wheel at the. re'arof the machine ca able of beingoperated to cause the rear en .ofithe machine to advanceoutof linewiththe front end, sothat eitherlblade maybe directed to advance morenearly ina lineparal-lel with the 3-5 longitudinal center. ofthelmachine to thereby cut more deeply into the ioad-surface- A furtherobject is to. provide improved means jfor-independently tilting theblades .-.to. change the angles'at which they engage the road-surfacerelative to,a vertical line.

" nation of the various parts of 'the machine ,whereby' the objectsycontemfpjlated are attained, as hereinafter more lly set forth,

pointed out in my Glfi11Ii$, and illustrated the accompanying drawingain which' Figure 1 Shows a top p1 a Com lete machine embodying myinvention, ig; 2 shows a side elevation otsa'me. F g.

"3 showsa front endvelevationvofsame with onset thescrapereblades'throvm to itsele- 7 of Letters Patent. I iatented -aiimmn a'i rnis,190s. Serial No. 312,362 2 of which t he following is afor steering it and raking] and lowering it, and Fig. 5 shows adetallperspec'tive view of a modified form of device for supporting thescraper-blades whereby they 5 may be tilted relative to avertical line.i e 5 Referring to the accompanying drawings, I have used thereference-numeral 10 to mdicate a forward axle, having onits ends the suporting-Wheels 1,1.

he machine-frame comprises two parallel center beams 12,extendingl the,full length of the machineand projecting over the axle 10 and-infrontlofit, the tongue-13 being ivoted between theforward ends thereof.i mediately in the rear of the axle IOisa' crossbeam 13, connected atits center with the axle 10 by means of the bolt 14,- which permits thebeam 13 to tiltfreelyrelative' to the axle- Th'e beams 12 stand a slihtdistance above the axle 10 to permit as ight tilting movement of thebeam 13 Two beams '15are Ialso rovided which extend'from a-point at theorward end of the machine above the axle--10 rearwardly' and inwardlytoward the centeriof the machine. These-beams 15 are attached to thecrossbeams.13, and shoulcross-piece 13 relative to the axle. At the rearend. ofthe machine-frame-is a 'crosspiece 17, to which the beams 12'and'the beams 15 are fixed. Erected on 'this'crosspiece 17 is astationary frame 18, havingat its .wardly and then upwardly and "mountedin I My'invention consists in certain details in the construction,arrangement, and combithe cross-piece 17 and frame 18, its upper endbeing angular at 24. YThis angular up-' per end extends through a lever25, which is plane across the top of the rack 20,, Mount- .Gd OIlthe'lever 25 is a spring actu'ated pawl 27, controlled by a handle2'8fand normally in engagement with rack 20'. i; BY] t is ar- 'rangementthe rear end of the machinemay be steered by the lever 25,,and this{lever may be set to any desiredposition, and held therein by the pawl27 Furthermore} (the upright 23 may .freely slide up and down ders 16are formed-intheforward ends to re-. c'eive theends of the axle 10, andin this way =to'permita limited tilting movement of the withouteflecting the steering of the machine; in:

Lhave providedv for raising and lowering the rear endof the-machine, asfollows: The numeral 29 indicates a stationarysupport in front of theupright 23] and having a. seg ,men tal rack 30. .Fulcnumed to thissupport '29 is'alever 31, provided with a spring-actue ated pawl 32tofengag'e the rabk 30. Qn the rear end of the leveris a linli33, pivtedto the upright 23. By this arrangement the 5 rear end of .the machinemay be raised or --lowered relative-to the caster-wheels 22 by means ofthe lever 31, and the pawl 32 serves to lock'it in any'position in whichit may be 'placed- As will be seen in the drawings, there are twoscraper-blades with independent means for operating them, These deviceson the opposite side of the machine-frame are exact counterparts, andhence but one will be herein described. Therefer'ence-numeral 34indicates rockshaft 'havin an angular body portion and =rou'nded on s.Therear end is'supp'ortedin' a'j bearing-box 35, pivoted to the rearcrosspiece 17, and the forward end is supported in a caring-box 36,pivoted to a sliding support- 'ing-bar37 This sliding supporting bar 37extends'across; the machine-frame in the rear of the ,wheelsll andbetween the transverse guides 38 and the longitudinal cleats 39 on.thebar 12 and 15. At about the central portion of the rock-shaft isanother sliding supportin'g-bar" 40, extended inwardly across themachine-frame and under the and 40 is'a beam 42, to'which the bladeraising and lowering means, hereinafter 'decleats-41. Mounted betweenthe bars 37 scribed,' are attached. I have provided means for "adjustingthe parts 37 and for supporting them in their adjusted positions;

. as follows: Fixed to the beams 12 above the v tion in which itjis set.

raising and lowering the scraper-blade atsupporting-bar 37 is asegmentalrack 43, and fulcrumed to the rack is a lever 44, carrying aspring-actuated pawl'45 to engage the rack43. The lower end of the leveris slotted at 46 to admit a pin 47, carried by the bar 37,. In this waya movement of the lever 44 will operate to slide the'bar 37 toward orfrom the center of the machine, and the pawl 45 will secure the lever inany posi- I have provided means for independently tached to" therock-shaft 34, as follows: Fixed to rock-shaft 34- are a number ofcurved arms 48, and on their outer ends is the scraperblade'49. At theforward end of the scraper- .blade I haveprovided a'reinforcing cutting"6o 'vided a means for bodily ,raising and lower blade'50', which maybediatached when worn and a new one substituted. I have proing each bladeI comprising a bevel gearwheel 51, fixed to the'rock-shaft 34. On thebar 42' is a bearing 51, in which the shaft 52 is rotatablymounted,Fixedly mounted on the'irock shaft 34 is a hearing 53, ha :i collar 54to receive the shaft A be gear-wheel 54 on the shaft .52 is in mesh withgear-wheel 51. On the u aper end of the shaft 52-isa hand-Wheel .6, bywhich the shaft 52 may be turned. In this way the rock-shaft 34 maybeamoved to raise and lowerthe scraper-blade .49 relative to theroad-surface or to throw the blade upw a r over the top of the machine,as shmvn in .r

4, and when in this position the blades we? not project beyond the sides.of the machine frame, and hence the machine may be dr. in through agateway of ordinary width have provided for holding the shaft 52 1various positions, as follows: Comic with the bearing 51 is an arm 57,to which flexible band-brake 58 is attached. band-brake passes around asmall learnt wheel 59 on the shaft 52, and attached to n other end is alink 60, to which the foot-l 61 is pivoted. Theoperator may, by pi ringhis foot upon said lever, actuate the band-brake to hold the shaft 52against rotation.

means for tilting -the .scraper-bh-dp relativw to the vertical line andI have shown a do vice for this purpose 111 Fig. 5. The scraperblade issupported from the rock-shat t 34 by means o'r two arms 62, pivoted to"the braciz.

'ets.63 on the outer face of the blade. his tached to oneof the arms 621s a segmental rack 64, to whicha lever 65 1s fulcrurnod,

Til f;

In some instances it is desirab to providr This lever is provided with aspring-actlr- 1 'ated pawl 66, and its lower end :18 shdinglyconnectedto the slotted bracket 67-, fixed to the upper edge portionofthe blade 49. By this arrangement the operator may grasp the suit therequirements by means of the levers 31. In steering the device underordinary cireumstances the'casterswheel: is set to position in line withthe long center of the ma c'hine- However, if it is desired to crowdtlu: machine toward one side of the road, so that it will out moredeeply on one side than the other, the operator mayset thesteering-wheel 2 so that it will direct the machine in the de siredmanner.- .During the ordinary opera-- tion ofth'e machine when bothblades are set to the posit on required foractive work the The i lever65, and bymanipiilati'ng it heinay til front axle may have aslight'tilting move we face.

seacee g i I ment relative to the maclnne-frame so as to adapt itself toinequalities of the road-sur- Having thus described my invention, what Iclaim,'and desire to secure byLetters Patent of the United Statestherefor, is-

' 1. In a road-scraper, thecombination of a front axie,fsupporting-wheels thereon, a

scraperbearing frame having pivotal connectlonwith the front axle, andmeans for limit-' mg the pivotal movement of the frame relative tothe'axle, I

2. In a road-scr'aper,- the combination of a front axle, snp'portingwheels mounted thereon,: a frame ..,converging toward the rear, and

-.. 1fea'id frameipivotally mounted at its front end {ii-:91); the'axleto permit .a limited tilting move mentof the ends ;of the axle relativeto the nan-t a rolling support for the rear end of theframe and twoscraper-blades fixed to sides of the frame to engage the road-surface.

'3. "in aroad-grade'r, a frontaide, supportingwyheels. thereon, aframecomprising a for-- ward erosspiece, 'a bolt extendedthrongh the centerofthe axle and. throughthe center of said crosapiece, arranged in ahorizontal *pianey-to pivotally connect the cross piece andanle,converging side beams connected with the cross-piece, having'their frontends designed to engage the top of the axle and to limit the tiltingmovement of the cross-piece relative to the axle, two scraper-bladesfixed to opposite sides of the machine and; a caster- .vvheel for{supporting the rear end ofthe frame.

'at', In a road-scraper, the combination ofa frame, supporting-wheelstherefor, two rock shafts supported by the f'ramearid arranged on-iinesconverging at the rear of themachine, arms connected with'eachrock-shaft, a scraper-blade carried by the said arms and means forswinging the scraper-blades from a position engaging the road-surface toapositienresting on top of the frame.

In a road-scraper, the combination of a frame, supporting-wheelstherefor, two rockshafts supported by the frame and arranged elinesconverging at the rear of the machine, arms connected with eachrock shaft, a scrapenblade carried by the said arms, means for swingingthe sei'ap'er blades from a'position engaging the road-surface, to aposition resting on top of-the frame, and means for adjnst' ngtheforward endsof SfilCllOCkshafts toward and from the longitudinal centhemachine.

. 6. Ina road-soraper, the combination of a frame, ,suppc'vrting wheelstherefor, two rocks h supported by the frame and arranged onnnmconverging at the rear of themai chine, arms connectedwith eachrock-shaft, a scraper-blade carried by eachset of arms meansfor-swinging the scraper-blades from a position engaging theToiid-surface to a posi-' tion resting on top of the frame, means foradjusting the forward ends of said rock-shafts toward and from thelongitudinal center of the machine, and means for holding eachrock-shaft in various positions.

'7.- In-a road-scraper, thecombination of a machine-frame, a rock-shaftextended from the forward end of the machine rearwardly and inwardly,bearing-boxes for the ends of.

the shaft mounted to swing in a horizontal plane,.a crosspiecesupporting the forward one of the said bearing-boxes and mountedslidingly on the frame, means for adjusting said cross-pieoe, a numberof arms fixed to the rbckshaft, a sorapenblade carried by said arms,means carried by the frame for ftilti-n the rock-shaft to move it fromposition engaging the road-surface to a position on top of theframe. a

f8. In a road-scraper, theco'mbination of. a front axle,supporting-wheels thereon, a frame having.rearwardly-converging sidesmoiinted on the front axle, thexcaster-wheel at therear end. of theframe, means for adjusting therear end-of theframe, up and down relativeto the caster, means for steering the caster and two scraper-blades onopposite sides of the framearranged on converging lines toward the rearend of the machine.

9. A road-scraper, comprising a frame, two

supporting-wheels at the front of the frame,

a castenwheel at the rear of the frame, said frame capable of slidingvertically relative to the cas'terwheehmean's for raising and loweringthe framerelative to the caster-wheel,.

means for securing the frame in different positions, a steering-leversliding-1y connected to the top of the casteravheel, a 'segmental'rackadjaeentto said lever, a spring-actuated pawl movedby the lever toengage the rack and two soraper-blades fixed to opposite sides of themachine-frame on lines. converging to- J RALPH One re,

F. C-mtisrn IIO

